When is the length of a day and night equal all over Earth? A: when the Sun is tilted toward Earth

B:when the Northern Hemisphere is tilted toward the Sun

C: when the Northern Hemisphere is tilted away from the Sun

D: when neither hemisphere is tilted toward or away from the Sun

March Equinox - Equal Day and Night, Nearly. There are two equinoxes every year, in March and September, when the Sun shines directly on the equator, and the length of night and day are nearly equal.

Explanation:

When Is the First Day of Spring? In 2021, the March equinox happens on Saturday, March 20, at 5:37 A.M. EDT. In the Northern Hemisphere, this date marks the start of the spring season. In the Southern Hemisphere, the March equinox marks the start of autumn, while the September equinox marks the start of spring.

your answer is "the 1950's"